Mutimeter and the 501 battery

[Derek365]

Hey

I got a multimeter today and was trying to test 501 batteries. No luck... I am pretty sure i have the multimeter set up correctly because i can test regular aa and aaa batteries but when i try to test 501 batteries and press the manual button on them the light on the battery just flashes. I have the red end of the multimeter touching the inside of the battery, the part that touches the atty and the black the threads that the atty screws into and only a flashing light on the 501 button????

any help would be appreciated

thanks a bunch

 

[CBB]

My guess would be you were shorting the battery with one of the leads and the protection circuit in the battery shut it off.

 

[OldDragon]

510 and ego batteries maybe hard to test due to the way they handle current. I have one of those led voltage display that can be screwed onto a 510 connection and it will not work on those batteries. I was told it is due to the voltage control features of the batteries. Works fine on my pt and mod.

 

[butt_ugly]

If the battery terminals become shorted by the multimeter test leads while the button is pressed, the internal voltage regulator fries and the light will flash only when the button is pressed. Take a sniff of the battery around the button, if it smells burned then it is.

 

[Eddie.Willers]

The issue here is whether you are using a digital multimeter or an analogue (excuse the pun!).

Digital meters (DMM's) do not load the circuit by not showing a high resistance - this may well trigger the battery protection mechanism as it thinks its being shorted out.
An older, conventional needle meter is the opposite - it takes current from the circuit to work properly but could avoid the shorting issue.

 

[nerve007]

In order to really find out what voltage you're putting on the atty, you would need to Thevenize the battery. In other words, every circuit can be thought of as a voltage source with an internal resistance. This is called the Thevenin model. This model can help you see how any atomizer will load the battery.

The open circuit voltage you were trying to measure could be meaningless if you don't have the Thevenin model. If the internal resistance of your battery is 5 ohms, and the your atty is 2.3 ohms, and you measure an open circuit voltage of 3.7 V, your atty is only seeing 1.57 V. (this is actually quite pessimistic, I'm sure you'll find its much more efficient)

If you really want to test this, there's lots of resources online about Thevenin. Just make sure you don't set your meter to measure resistance and put it directly across the battery. That would make you and your meter pretty upset.

Research it and test it out. I'm curious to see the results. I think I'll go Thevenize my eGo.

 

[Trakitana]

The issue here is whether you are using a digital multimeter or an analogue (excuse the pun!).

Digital meters (DMM's) do not load the circuit by not showing a high resistance - this may well trigger the battery protection mechanism as it thinks its being shorted out.
An older, conventional needle meter is the opposite - it takes current from the circuit to work properly but could avoid the shorting issue.

I use a Digital Multimeter on my 510 batteries and mods and never had any problems.

 

[Derek365]

so the battery is really sensitive to shorts.... i fiquered out you need to keep the positive, red, part of the multimeter on the inside of the circle where the atomizer goes without touching any of the ring, which with my shaky hands is quite difficult, but possile and then the black tester on the outside threads.... some of what you guys said goes right over my head but the batteries are reading at about 3.5 and the riva 501's at 4.5 so i think i am getting an accurate reading but i could be wrong....

now i am trying to test the ohms on my cartos but that is not working

thanks for all the advice and vape on my friends